A research on greenhouse heating with stored solar energy using water and nano fluid (AL203)

In this study, it is aimed to store solar energy for a short time (day-to-night) by sensible heat storage method, using water (nanofluid) mixed with nanoparticles (Al2O3) as heat storage material to be used in heating the plastic greenhouse with a floor area of 140 m2 under Adana climate conditions. During the period of heating with water, the temperature difference between the indoor and outdoor environment of the greenhouse was determined to be 4.6 C on average, and the temperature difference between the heating fluid entering and leaving the greenhouse was 5.7 C. In the case of using hot water as the heating fluid, the rate of meeting the greenhouse heat requirement was determined to be 38.45% on average during the night periods of heating, and 44.36% during the period when hot nanofluid was used. In the case of using hot water as the heating fluid, the thermal power/exergy ratio was determined to be 9.86% on average during the night periods of heating, while it was determined to be 10.69% in the period when hot nanofluid was used while the total daily energy, fuel and emission savings for heating the greenhouse was determined as 37.6% during the period of water heating, it was determined as 42% during the period of heating with nanofluid. In the case of heating with water, the payback period for saving natural gas is 5.84 years, and the payback period for coal savings is 4.47 years.